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test_RefPat.py
from guppy.heapy.test import support import io import sys import types import unittest class TestCase(support.TestCase): def setUp(self): support.TestCase.setUp(self) self.RefPat = self.heapy.RefPat self.iso = self.Use.iso def makegraph(self, width, length): # Generate a structure which will yield a high number # of shortest paths. # Returns a pair src, dst which are connected via a noncyclic graph # with many edges. # The length of each path (all shortest), number of edges will be length # The number of nodes will be 2 + width * (length - 1) # The number of paths will be # width ** length, if width >= 1 and length >= 1 dst = [] ls = [] for i in range(width): ls.append([dst]) ls = [dst] * width for i in range(length-1): xs = [] for j in range(width): ys = [] xs.append(ys) for k in range(width): ys.append(ls[k]) ls = xs src = ls return src, dst def rp(self, dst, src, **kwds): iso = self.iso if src is not None: src = iso(src) rp = iso(dst).get_rp(src=src, **kwds) rp.mod.UniSet.summary_str.str_address = lambda a: '<address>' return rp class RefPatCase(TestCase): def test_basic_methods(self): # Test basic methods: iteration, indexing, length, tree addressing via attribute access # Test iteration dst = src = [] lists = [dst] for i in range(5): src = [src] lists.append(src) rp = self.rp(dst, src, depth=10) for i, x in enumerate(rp): if i < len(lists): self.asis(lists[i], x.theone) # Test indexing # First case, when already iterated over self.asis(rp[0].theone, lists[0]) self.asis(rp[-2].theone, lists[-1]) # Second case, when not iterated over before rp = self.rp(dst, src, depth=10) self.asis(rp[0].theone, lists[0]) self.asis(rp[-2].theone, lists[-1]) # Test length self.aseq(len(rp), len(lists) + 1) rp = self.rp(dst, src, depth=10) self.aseq(len(rp), len(lists) + 1) # Test attribute access self.asis(rp._.theone, lists[0]) self.asis(rp.a.theone, lists[1]) # Test attribute access, when not iterated over before rp = self.rp(dst, src, depth=10) self.asis(rp.a2.theone, lists[2]) self.asis(rp.a.theone, lists[1]) # Make sure attribute access is cached: # so it doesn't change when struct is changed lists[2].append(lists[0]) rp.View.clear_retainers() rp.View.update_referrers(self.iso(lists[0])) self.asis(rp.a.theone, lists[1]) # Test with recursive structure dst = [] dst.append(dst) src = [dst] rp = self.rp(dst, src) self.asis(rp._.theone, dst) self.aseq(rp.a, self.iso(dst, src)) self.aseq(rp.a, rp.a2) self.aseq(rp.a, rp[1]) def test_presentation(self): output = io.StringIO() src = [] def write(x): print(x, file=output) R = self.RefPat def test_pp(dst, src, result=None, **kwds): rp = self.rp(dst, src, **kwds) write(repr(rp)) return rp dst = [] src.append(dst) test_pp(dst, src) for i in range(5): x = dst dst = [] x.append(dst) test_pp(dst, src) src, dst = self.makegraph(5, 7) test_pp(dst, src, depth=10) # Test that pp() prints limited number of lines src, dst = self.makegraph(5, 17) rp = test_pp(dst, src, depth=17) write(repr(rp.more)) # Test more of more src, dst = self.makegraph(1, 30) rp = test_pp(dst, src, depth=35) m = rp.more write(repr(m)) write(repr(m.more)) m1 = m.more write(repr(m1)) m2 = m.more write(repr(m2.more)) write(str(m1.more)) # Test also that str() is the same as repr() # Test that we get back to start by .top write(m1.top) # Test that we get back to previous by .prev write(m1.prev) # Test that they won't say '...more lines...' if the # of lines is what is printed src, dst = self.makegraph(1, 30) rp = test_pp(dst, src, depth=10) # Test how no more lines is printed write(rp.more) write(rp.more.more) # Test that one more line is printed rather than '1 more line' src, dst = self.makegraph(1, 30) rp = test_pp(dst, src, depth=21) write(rp.more) # Test that we can do more without first printing rp = self.rp(dst, src, depth=20) write(rp.more) self.aseq(output.getvalue(), """\ Reference Pattern by <[dict of] class>. 0: _ --- [-] 1 list: <address>*0 1: a [-] 1 list: <address>*1 2: aa ---- [R] 1 tuple: <address>*1 Reference Pattern by <[dict of] class>. 0: _ --- [-] 1 list: <address>*0 1: a [-] 1 list: <address>*1 2: aa ---- [-] 1 list: <address>*1 3: a3 [-] 1 list: <address>*1 4: a4 ------ [-] 1 list: <address>*1 5: a5 [-] 1 list: <address>*1 6: a6 -------- [-] 1 list: <address>*1 7: a7 [R] 1 tuple: <address>*1 Reference Pattern by <[dict of] class>. 0: _ --- [-] 1 list: <address>*0 1: a [-] 5 list: <address>*5, <address>*5, <address>*5, <address>*5... 2: aa ---- [-] 5 list: <address>*5, <address>*5, <address>*5, <address>*5... 3: a3 [-] 5 list: <address>*5, <address>*5, <address>*5, <address>*5... 4: a4 ------ [-] 5 list: <address>*5, <address>*5, <address>*5, <address>*5... 5: a5 [-] 5 list: <address>*5, <address>*5, <address>*5, <address>*5... 6: a6 -------- [-] 5 list: <address>*5, <address>*5, <address>*5... 7: a7 [-] 1 list: <address>*5 8: a8 ---------- [R] 1 tuple: <address>*1 Reference Pattern by <[dict of] class>. 0: _ --- [-] 1 list: <address>*0 1: a [-] 5 list: <address>*5, <address>*5, <address>*5, <address>*5... 2: aa ---- [-] 5 list: <address>*5, <address>*5, <address>*5, <address>*5... 3: a3 [-] 5 list: <address>*5, <address>*5, <address>*5, <address>*5... 4: a4 ------ [-] 5 list: <address>*5, <address>*5, <address>*5, <address>*5... 5: a5 [-] 5 list: <address>*5, <address>*5, <address>*5, <address>*5... 6: a6 -------- [-] 5 list: <address>*5, <address>*5, <address>*5... 7: a7 [-] 5 list: <address>*5, <address>*5, <address>*5... 8: a8 ---------- [-] 5 list: <address>*5, <address>*5, <address>*5... 9: a9 [-] 5 list: <address>*5, <address>*5, <address>*5... <Type e.g. '_.more' for more.> 10: a10 ----------- [-] 5 list: <address>*5, <address>*5, <address>*5... 11: a11 [-] 5 list: <address>*5, <address>*5, <address>*5... 12: a12 ------------- [-] 5 list: <address>*5, <address>*5, <address>*5... 13: a13 [-] 5 list: <address>*5, <address>*5, <address>*5... 14: a14 --------------- [-] 5 list: <address>*5, <address>*5, <address>*5... 15: a15 [-] 5 list: <address>*5, <address>*5, <address>*5... 16: a16 ----------------- [-] 5 list: <address>*5, <address>*5, <address>*5... 17: a17 [+] 1 list: <address>*5 Reference Pattern by <[dict of] class>. 0: _ --- [-] 1 list: <address>*0 1: a [-] 1 list: <address>*1 2: aa ---- [-] 1 list: <address>*1 3: a3 [-] 1 list: <address>*1 4: a4 ------ [-] 1 list: <address>*1 5: a5 [-] 1 list: <address>*1 6: a6 -------- [-] 1 list: <address>*1 7: a7 [-] 1 list: <address>*1 8: a8 ---------- [-] 1 list: <address>*1 9: a9 [-] 1 list: <address>*1 <Type e.g. '_.more' for more.> 10: a10 ----------- [-] 1 list: <address>*1 11: a11 [-] 1 list: <address>*1 12: a12 ------------- [-] 1 list: <address>*1 13: a13 [-] 1 list: <address>*1 14: a14 --------------- [-] 1 list: <address>*1 15: a15 [-] 1 list: <address>*1 16: a16 ----------------- [-] 1 list: <address>*1 17: a17 [-] 1 list: <address>*1 18: a18 ------------------- [-] 1 list: <address>*1 19: a19 [-] 1 list: <address>*1 <Type e.g. '_.more' for more.> 20: a20 --------------------- [-] 1 list: <address>*1 21: a21 [-] 1 list: <address>*1 22: a22 ----------------------- [-] 1 list: <address>*1 23: a23 [-] 1 list: <address>*1 24: a24 ------------------------- [-] 1 list: <address>*1 25: a25 [-] 1 list: <address>*1 26: a26 --------------------------- [-] 1 list: <address>*1 27: a27 [-] 1 list: <address>*1 28: a28 ----------------------------- [-] 1 list: <address>*1 29: a29 [-] 1 list: <address>*1 <Type e.g. '_.more' for more.> 20: a20 --------------------- [-] 1 list: <address>*1 21: a21 [-] 1 list: <address>*1 22: a22 ----------------------- [-] 1 list: <address>*1 23: a23 [-] 1 list: <address>*1 24: a24 ------------------------- [-] 1 list: <address>*1 25: a25 [-] 1 list: <address>*1 26: a26 --------------------------- [-] 1 list: <address>*1 27: a27 [-] 1 list: <address>*1 28: a28 ----------------------------- [-] 1 list: <address>*1 29: a29 [-] 1 list: <address>*1 <Type e.g. '_.more' for more.> 30: a30 ------------------------------- [-] 1 list: <address>*1 31: a31 [R] 1 tuple: <address>*1 30: a30 ------------------------------- [-] 1 list: <address>*1 31: a31 [R] 1 tuple: <address>*1 Reference Pattern by <[dict of] class>. 0: _ --- [-] 1 list: <address>*0 1: a [-] 1 list: <address>*1 2: aa ---- [-] 1 list: <address>*1 3: a3 [-] 1 list: <address>*1 4: a4 ------ [-] 1 list: <address>*1 5: a5 [-] 1 list: <address>*1 6: a6 -------- [-] 1 list: <address>*1 7: a7 [-] 1 list: <address>*1 8: a8 ---------- [-] 1 list: <address>*1 9: a9 [-] 1 list: <address>*1 <22 more lines. Type e.g. '_.more' for more.> 10: a10 ----------- [-] 1 list: <address>*1 11: a11 [-] 1 list: <address>*1 12: a12 ------------- [-] 1 list: <address>*1 13: a13 [-] 1 list: <address>*1 14: a14 --------------- [-] 1 list: <address>*1 15: a15 [-] 1 list: <address>*1 16: a16 ----------------- [-] 1 list: <address>*1 17: a17 [-] 1 list: <address>*1 18: a18 ------------------- [-] 1 list: <address>*1 19: a19 [-] 1 list: <address>*1 <12 more lines. Type e.g. '_.more' for more.> Reference Pattern by <[dict of] class>. 0: _ --- [-] 1 list: <address>*0 1: a [-] 1 list: <address>*1 2: aa ---- [-] 1 list: <address>*1 3: a3 [-] 1 list: <address>*1 4: a4 ------ [-] 1 list: <address>*1 5: a5 [-] 1 list: <address>*1 6: a6 -------- [-] 1 list: <address>*1 7: a7 [-] 1 list: <address>*1 8: a8 ---------- [-] 1 list: <address>*1 9: a9 [-] 1 list: <address>*1 10: a10 ----------- [+] 1 list: <address>*1 Reference Pattern by <[dict of] class>. 0: _ --- [-] 1 list: <address>*0 1: a [-] 1 list: <address>*1 2: aa ---- [-] 1 list: <address>*1 3: a3 [-] 1 list: <address>*1 4: a4 ------ [-] 1 list: <address>*1 5: a5 [-] 1 list: <address>*1 6: a6 -------- [-] 1 list: <address>*1 7: a7 [-] 1 list: <address>*1 8: a8 ---------- [-] 1 list: <address>*1 9: a9 [-] 1 list: <address>*1 <Type e.g. '_.more' for more.> 10: a10 ----------- [-] 1 list: <address>*1 11: a11 [-] 1 list: <address>*1 12: a12 ------------- [-] 1 list: <address>*1 13: a13 [-] 1 list: <address>*1 14: a14 --------------- [-] 1 list: <address>*1 15: a15 [-] 1 list: <address>*1 16: a16 ----------------- [-] 1 list: <address>*1 17: a17 [-] 1 list: <address>*1 18: a18 ------------------- [-] 1 list: <address>*1 19: a19 [-] 1 list: <address>*1 <Type e.g. '_.more' for more.> 10: a10 ----------- [-] 1 list: <address>*1 11: a11 [-] 1 list: <address>*1 12: a12 ------------- [-] 1 list: <address>*1 13: a13 [-] 1 list: <address>*1 14: a14 --------------- [-] 1 list: <address>*1 15: a15 [-] 1 list: <address>*1 16: a16 ----------------- [-] 1 list: <address>*1 17: a17 [-] 1 list: <address>*1 18: a18 ------------------- [-] 1 list: <address>*1 19: a19 [-] 1 list: <address>*1 20: a20 --------------------- [+] 1 list: <address>*1 """) def test_referrer_registration(self): import gc # The reference pattern should register itself as referrer target # so that after a gc, the rp target will still be included in the referrer target # Since the target is passed to referrers and update, it will still find the # referrers. It is an optimization issue: it should cover the referrers. # We test this by having two different-typed referrers # Accessing a referrer of the first one, then gc collecting, then checking that # the second one can be accessed without update: it was created automatically. # The test failed when not registering, but succeeded when registering was added. # It succeeds any case if no GC collection is made. dst = [] a = [dst] aa = [a] b = (dst,) ba = [b] src = [aa, ba] rp = self.rp(dst, src) self.asis(rp._.theone, dst) gc.collect() self.asis(rp.aa.theone, aa) self.asis(rp.View.rg[b][0], ba) def test_some_more_advanced_usages(self): import gc # Test immediate dominators dst = [] src = [dst] src.append([dst]) rp = self.rp(dst, src, depth=10, imdom=1) self.asis(rp._.theone, dst) self.asis(rp.a.theone, src) # Test with mixed types # In particular, dict owned by an instance dst = [] class A: pass a = A() a.dst = dst b = {'dst': dst} src = (a, b) gc.collect() rp = self.rp(dst, src, depth=10) rp.mod.View._is_clear_drg_enabled = 0 # Note Apr 19 2005 if sys.getsizeof(b) > sys.getsizeof(a.__dict__): self.asis(rp.a.theone, b) self.asis(rp.b.theone, a.__dict__) else: self.asis(rp.a.theone, a.__dict__) self.asis(rp.b.theone, b) # Test that the dict is eventually automatically removed from dictowners - # First test that dictowners is nonzero ln = len(rp.mod.View.dict_ownership) self.assertTrue(ln > 0) del src del a mod = rp.mod rp.mod.View._is_clear_drg_enabled = 1 del rp # It is cleared after GC gc.collect() lnnow = len(mod.View.dict_ownership) self.assertTrue(lnnow == 0) class NewCase(TestCase): # Some new tests as they come up def test_reset(self): # Test the .reset() method dst = [] a = [dst] b = [dst] src = [a, b] rp = self.rp(dst, src) self.aseq(rp.a, self.iso(a, b)) b.pop() rp.reset() self.aseq(rp.a, self.iso(a)) def test_paths(self): # Test the .paths() method dst = [] a = [dst]+[None]*40 # Make order well-defined. Note May 2 2005. b = [dst] src = [a, b] rp = self.rp(dst, src) expected = """\ Paths from source 'a3' to target '_'. 0: a3 [0] @ [0] 1: aa [0] @ [0] 2: a [0] @ [0] 3: _ [0] = <1 list: <address>*0> 4: aa [0] @ [1] 5: a [1] @ [0] -> #3""" self.aseq(str(rp.paths('a3')), expected) expected = expected[:expected.index('\n 4:')] # Test the andsets argument, given as a dict self.aseq(str(rp.paths('a3', andsets={'a': self.iso(a)})), expected) # Test the andsets argument, given as a list self.aseq( str(rp.paths('a3', andsets=[None, None, self.iso(a)])), expected) def test_main(debug=0): support.run_unittest(RefPatCase, debug) support.run_unittest(NewCase, debug) def test_leak(): # Runs the tests in a loop and prints memory statistics, # to see if there are underlying low-level memory problems. # Requires Python to be compiled with debug support. from guppy.heapy.heapyc import xmemstats import gc import sys import time i = 0 xmemstats() while 1: print('[%d]' % i, time.asctime()) i += 1 test_main() gc.collect() xmemstats() if __name__ == "__main__": test_main()
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